Tension device for textile machinery.



No.806,555. 'PATENTED DBC.5,"1 905. JrR. MITCHELL.

TENSION DEVICE FOR TEXTILE MACHINERY.- Arruonmn FILED MAR.18, 1905;

UNITED STATES PATENT 1 OFFICE.

JOHN R. MITCHELL, or MONTGLAI NEW JERSEY.

' T-ENSION DEVICE FOR -TEXTILE MACHINERY.

[ all whom, it may concern:

Be it known that I, JOHN R. MITCHELL, a citizen of the United States, residing at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful cure the desired friction, the fingers being rotatable around a center in order to vary the deflection of the thread and increase or decrease the tension. sion devices the center of rotary adjustment has been at one side of or between the arms or fingers, with the result that in changing the tension there is a traveling movement of both arms or fingers, and consequently a change of direction of travel of the thread in passing to and from the tension device. This change of direction of travel is objectionable, especially when the thread is drawn endwise from a cop or other like supply, because the tension or resistance of the thread will vary under any change of the angle of draft or delivery.

To overcome this objection, I provide for so;

supporting the device that it will be adjustable rotatably about a center coinciding with the center of one of the arms or fingers at the point where the thread passes around the same, as fully set forth hereinafter, and as illustrated in the accompanying drawings, in which- Figure l is a perspective view of a tension device embodying my improvements. Fig. 2 is an end view; Fig. 8, a view showing a device constructed somewhat difierently. Fig. 4 is a plan view.

The device may be constructed in any suit able manner, so as to supporttwo fingers or arms I; 'c and so that it may be secured in place upon the frame of the apparatus with which it is used. As shown in Fig. 1, there is a block or support a, from one edge of which extend two diverging fingers Z2 0', these parts being preferably of vitreous material, and a spindle (Z extends from the opposite end and is threaded and provided with a nut 6, so that the spindle may be passed through an opening in the frame and the device then secured in place by means of the nut, but so as to be adjustable rotatably about the axis of the spindle, the thread being carried up from the Specification of Letters Patent. Application filed March 18, 1905. Serial No 250,8I9.

Heretofore in this class of ten Patented. Dec. 5, 1905.

package over one arm and then down and be- .neath the other, as usual.

The parts above described do not differ materially from those oftension devices as usually constructed, except that the spindle or other attaching deviccl is'so arranged that its axis around which the device is adjustable coincides with the'center or'axis of the arm 6' els in the same vertical path whatever may be the adjustment of the device, (shown in two positions by dotted lines, Fig. 2,) because there is'no change in position'o'f the bearing portionof the arm 5 in consequence of the change of position of the device, as required tovary the tension of the thread.

. In theconstruction shown invFig. 3 the spindle is in the form of a screw d, passing through 'a perforated arm or stud b and through a plate a, carrying another stud o.

The said tension device is especially adapted for use in connection with textile machinery, but may be employed wherever it is necessary to carry the thread from the supply or to the machine in an unchangeable course, while permitting the adjustment of the tension.

Without limiting myself to the precise construction shown, I claim.

1. A pivoted tension device having two arms, one with its axis in line with that of the pivot and arranged to receive the yarn directly from the package, and the other arm at adistance from the first, substantially as set forth.

2. The combination with a winding-machine and package-support, of a pivoted tension device having an arm in line with the pivot 'arranged to receive the thread above the center of the package-support, and a second arm adjustable around the axis of the first, substantially as set forth- In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- JOHN R. MITCHELL.

Witnesses: 'HowARD J. BELL, G120. WoEHALIN. 

